arbon, as with many elements, can arrange its atoms into several different geometries, or "allotropes." In pure diamond, every carbon atom is covalently bonded to exactly 4 other carbon atoms in a very specific and energetically favorable geometry. The diamond cannot be broken or scratched unless many covalent bonds are broken, which is difficult to do. In another common allotrope, graphite, every carbon atom is covalently bonded to only 3 other carbon atoms, and the atoms are arranged in sheets that are not covalently bonded to each other. The sheets can be broken apart easily, ultimately meaning that graphite can be easily scratched. Coal is composed of particles of different allotropes of carbon, and some "amorphous carbon," which has no defined geometry in its atomic structure. Without a continuous network of covalent bonds, coal is easily scratched (i.e. it is not hard).
Answer:
lysosomes
Explanation:
disease causing organisms (bacteria) is engulfed by process phagocytosis
<u>Advantages</u>:-
Following mentioned are a few enlisted positive effects (of using windmills):
• It is cost-free; in other words it is inexpensive or affordable.
• In fact it is and can be an alternate for fossil fuels.
• Moreover, wind energy is a domestic source of energy.
• It helps in controlling air pollution which is a huge threat to life.
• Furthermore, it utilizes merely a small amount of land the rest of which can be used by farmers wisely.
Written by: Mmkhn
All cells have these four parts in common: a plasma membrane, cytoplasm, ribosomes, and DNA
